Your small intestine does most of the digesting of the foods you eat. If you have a malabsorption syndrome, your small intestine cannot absorb nutrients from foods. Causes of malabsorption syndromes include. 1  Celiac disease. 2  Lactose intolerance.  Short bowel syndrome. This happens after surgery to remove half or more of the small intestine. You might need the surgery if you have a problem with the small intestine from a disease, injury, or birth defect.
The exhaust manifold obviously carries exhaust away from the engine compartment. When the manifold fails to completely perform that function, fumes can enter the coach. This was not detected however in my coach so that telltale signal was missing. The manifold if leaking can reportedly injure the engine. And exhaust gases are used by the turbo system. If that is not performed well, you will notice a loss of boost (power) and mpg. If left unattended (repaired) the leak can also leak hot gasses into equipment and areas where it does not belong.
Â· just now. Report Abuse. The manifold leak and low power out put could be caused by a plugged up exhaust or bad cat converter Midas Muffler can take an o2 sensor out and hook up a pressure gauge and in a minute or two give you the bad news you have been waiting for.elevance. Rating Newest Oldest. Best Answer: headers will give you much more hp maybe 5 to even 15hp. but yes a leak in the manifold can cause a drop because that cylinder(s) will lose an amount of the back pressure on the o2 sensor system to cause the drop in hp.